My absolute favorite conversation happened with one of my little boys today when we were talking about finding out my baby's gender.

Boy: "Mrs. McKanna, how do they tell the difference between a girl baby and a boy baby."
Me: "Well, have you heard of an ultrasound before?"
Boy: "No, ma'am."
Me: "They take this wand and when they put it over my belly they can see the baby inside...and then they look for boy parts or girl parts."

I wish you could see his face as it registered. He winces and asks, "You mean it's naked?!"
Me: "Well my baby certainly isn't clothed!"